Scientists can learn a great deal about people based on their teeth. Teeth
can reveal people’s age, diet and where they live. Teeth can also
display signs of stress or illness, providing researchers with a detailed
history of a person’s life and health.

Teeth Mark Your Individuality

Your teeth are as unique as your fingerprints. No two teeth—even two
teeth in the same person’s mouth—are the same. Each of your 20
baby teeth and 32 permanent teeth has its own profile and varies in shape and
size.

They’ve Been With You Since
Birth

Your teeth were always there—even if no one could see them at first.
You are born with the crowns of your baby teeth beneath your gums. These
teeth make their entrance when you’re 3 to 6 months old. The crowns and
roots of your permanent teeth form beneath your baby teeth, eventually
pushing them out of the way and triggering a visit from the Tooth Fairy.

Teeth Survive Long After Death

The enamel on teeth is stronger than any other part of the body—so
strong that it can remain intact for hundreds of years after someone dies.
Studying the teeth of human ancestors has taught scientists some fascinating
things about history. For example, studies of dental remains have found
evidence that the first travelers to leave Africa for China set out
about 80,000 years ago and that early humans used a simple form of aspirin
for pain relief. Even the toughest substance in the body needs regular care,
however.

Your Teeth Are Tough, But They Need
Your Help

There are more than 300 different types of cavity-causing bacteria. They
feed on leftover sugar in your mouth, creating acids that leave small holes
in your teeth. Protect your teeth by brushing twice a day with a fluoride
toothpaste, cleaning between your teeth once a day, and eating a healthy diet
that limits sugary drinks.

Who Cares About Your Teeth?

Your dentist does. In addition to daily home care, your teeth need regular
dental cleanings and checkups. Visit https://findadentist.ada.org
for a nearby American Dental Association dentist who will work with you to
help protect one of your most unique features—your smile.